Lighting fixture



July 19, 1927.

R. M. GRAVES ET AL LIGHTING FIXTURE Filed Avril Z4,

Patented July 19, 1927.1

UNITED "STATES 1,636,414 PATENT OFFICE.

BOY I. GRAVES AND EUGENE R. DOLIVE, OF CHICAGO, ILLINOIS, ASSIGNOBS TO AS- SOCIATED ENGINEERS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OII' ELIN'OIS.

LIGHTING FIXTURE.

Application filed A ril 24, 1925. Serial No. 25,576.

Our invention relates to lighting fixtures and more particularly to a fixture that is adapted for store and showcase lighting.

It is the purpose of our invention to provide a lighting fixture of the above mentioned character that is adapted to effectively light a showcase and at the same time rovide general illumination for the room 1n which the fixture is placed. Said fixture preferably comprises means for illuminating the showcase and means for illuminating the walls and sealing of the room, said means being associated in a single fixture.

More particularly, it is the purpose of our invention to provide a lighting fixture comprising a body portion having ahollow base member within which an electric lamp or other li hting means is placed, said base portion fieing preferably placed on the glass 0 to of a showcase so that the lighting means wlthin the hollow base will shine into the showcase. The device is preferably a portable fixture and is provided on the upper end thereof with a light difiusing and refleeting member within which is placed an electric lam or other lighting means so that the light therefrom is thrown principally upwardl and laterally against the ceiling and wal s of the room in which the fixture is laced.

t is another object of. the invention-to provide a lighting fixture of the above mentioned character that is provided with a bowl-like member having a portion made up of a light-diifusing glass and a portion made up of color-corrective glass, said bowl-like member being provided with a shade so as to hide the same and give a better appearance to the fixture. When such color cm- 40 rective glass is provided, suitable means is rovided. for cutting off the direct light i rom the diifusin portion of the bowl, to thus prevent the fiight therefrom from affooting the color corrected light.

It is another purpose of our invention to provide a lighting fixture having a base that is referably made of pottery and is hollowed vex member the inner surface of which is W preferably glazed so as to serve as a reflectmg surface to throw the'light downwardly through a transparent member upon which the fixture is placed.

In general store lighting as ordinarily out so as to form a concavo-con-,

done it is necessary to permanently mount the hghtlng means in the building, and, as

is well known, the lighting means then becomes a part of the building and no longer belongs to the tenant of a store. For this reason it has often been found diflicult to convince a storekeeper to provide modern lwhting means for a store, because owners 0 buildings ordinarily will not spend the money necessary 'to modernize the lighting for tenants and tenants do not care to invest the money in lighting equipment that becomes the property of the owner of the building. By providing a portable fixture of the character referred to this difficulty is avoided, as the fixture remains the property of the tenant and yet is so constructed that it not only gives a more attractive and pleasing'lightlng for the store room in general but also'ligh'ts up the showcase. By making th:t device portable there is no installation co By using the fixture described above all. the glare from the lighting means is eliminated as the showcase lighting lamp is shielded by the fixture in such a way that no reflection or glare from the same will reach the eyes of the person looking into the show case. Also by providing suitable colored lamps or other colored light producing means, illumination of any desired color may be provided in the showcase independently of the general illumination.

Other objects and advantages of our invention will appear as the description of the accompanying drawings proceeds' However, we desire to have it distinctly understood that we do not intend to limit ourselves to the exact details shown or described, but that we intend to include as part of our invention all such obvious changes and modifications of arts as would occur to a erson skilled in this art and as would fall a.

that it forms a base member 11. Said base member is provided with an inner wall portion 12 that is curved so as to form a concave-convex member with a concave inner face which is glazed so as to provide a good reflecting surface. The body portion 10 and base 11, as well as the reflector portion 12, are preferably substantially circular in cross-section. The hollow base 11 is open at the bottom thereof, providing a circular supporting edge portion 13 that is provided with a plurality of cut-away portions or upward offsets 14, thus providing slits or air openings 15 between the supportin surface 16 upon which the fixture is place and the edge 13.- The supporting surface '16 is preferably glass, being preferably the top of a showcase.

The partition or reflecting portion .12 is preferably provided with a central opening 17 through which the stem portion 18 of a lighting member, such as an electric lamp 19, is adapted to be projected, said lamp 19 being provided with the usual screw-threaded portion 20 that enters the socket 21 in the usual manner. The socket 21 is provided with an internally threaded end portion 22 that is adapted to receivethe threaded end 23 of the conduit 24, which is provided with a threaded end 25 that screw-threadedly engages with the threaded socket portion 26 of the connector 27 having the side openings 28 through which the conductors, which will be described below, are adapted to be extended. Said member 27 is further provided with a screw-threaded end 29 that is adapted to s'crew-threadedly engage with the internally screwthreaded end portion 30 of the socket member 31 and into which the screw-threaded end of the lamp 32 having the stem portion 33 is adapted to extend. The body portion 10 is provided with an internal annular lip or shoulder 34 against which the plate 35, having a plurality of openings 36 therein, is adapted to be clamped by means of the nut 37 that is threaded on the screw-threaded end 23' of the member 24. Cooperating with the plate to clamp the cbnduit and sockets in position within the body portion 10 is the tubular member 38 having the flange 39 thereon that is adapt-- ed to engage with the upper edge 40 of the member 10. The member 38 is cup-like in form and has an end wall 41 that has a central opening 42 ada ted to receive the screwthreaded end 29 o the member 27 and be clamped between the end 30 of the socket 31 and the member 27. The end wall 41 is provided with a plurality of openings 43 through certain of which conductors pass which will be described below and certain of which serve as openings for the passage of air through the interior of the fixture.

Mounted upon the upper end of the body portion 10 is a metal spinning 44 terminating in a flange 45, which is provided with screw-threaded openings for receiving the set screws 46. A bowl-like glass member 47, having the hook-like annular flanged portion 48 thereon, is mounted on said spinning 44 and the set screws 46 engage with the hook flange 48 to hold said bowl 47 in' position. The bowl member 47 is preferably made up of a substantially conical portion 49 and a concavo-convex face port-ion 50. The portion 49 is preferably made of diffusing glass, such as frosted or opal glass, and is adapted to reflect the major portion of the illumination from the lamp 32 upwardly and laterally against the ceiling and Walls of the room in which the fixture is placed. The portion 50 also serves partially as a reflector but is preferably made of a glass that is either colored or'is sprayed with a pigment so as to be colored in a proper manner to correct the color of the light coming from the lamp 32 to obtain substantially a daylight effect from the light transmitted through the portion 50, which is thrown downwardly adjacent the body portion10 so that color matching can be accomplished within the zone illuminated by the portion 50 of the bowl-like member 47 below the same.

Mounted upon the bowl-like member 47 is a shade 51 which is preferably provided with hooks 52 en aging over the upper edge of the member 4 for holding the same in position. The lower edge of the shade 51 is provided with any suitable form of braid or binding material 53 and said lower edge is preferably so located relative to the break 54 in the curvature of the bowl that the light from the portion 50 thereof will preferably all pass out below the bottom of the edge of the shade,- while any light transmitted through the portion 49 will be thrown against the shade 51. The length of the body portion 10 is preferably such that the bowl-like member 47 will be located above the line of vision of the ordinary person when the base member 11 is positioned upon a showcase of ordinary height, thus placing the showcase illuminating lamp 19 below the plane of vision of the observer and the room illuminatin lamp 32 above vthe plane of vision of t e observer.

Mounted within the spinning or shell 44 are switches 55 and 56, which may be of any desired type but are shown as being pushbutton switches in Fig. 1 of the drawing. The body portion 10 is provided with an opening 57 near the bottom thereof, within which is niounted a bushing 58 and into which extend the conductors 59 and 60 which supply the current for the lamps 19 and 32. The conductor 59 extends through one of the openings 36 in the plate 35 and upwardl to the switch 55. conductor 61 exten from the switch 55 through the conduit 24 to v the lamp 19 and a conductor 62 leads from said lamp to the conductor 60, with which the same is connected in any desirable manner. The conductor 60 also extends through an opening 36 in the plate and upwardly through an opening 43 in the end wall 41 of the member 38 to the switch 56. From the switch 56 a conductor 63 extends to the lamp 32, being connected in the usual manner with the'socket 31. A conductor 64. leads from said socket to the conductor 59, being connected therewith in any desired manner. From Fig. 3 it will be seen that by operating the switch 55 the lighting of the lamp 19 is controlled, whereas by operating the switch 56 the lighting of the lamp 32 is controlled,.

Thus either or both lamps may be operated as desired, obtaining either room or showcase illumination or both, as may be desired.

By providing the openings 15, the opening 17,.the openings 36 and the openings 43 the lamp 19 is ventilated, thus preventing undue 'heating of the body portion 10 and particularly the base portion 11, due to the presence of the lamp 19 therein. By making the openings 15 relatively short there will be substantially no reflection of light from the lamp 19 through said openings from the surface of the glass 16.

When the color corrective glass is provided it is desirable to provide means for preventing the light from the portion 49 of the bowl from mingling with the lighting transmitted through the portion 50. A baffie member 65 of parchment or cloth is provided for this purpose, said member being supported b the wire frame having the rings 66 an 67 connected by the wires 68. The entire baffle member is supported b the hook-like member 69 on the shade whic engage the ring 67 t A From the above it will be seen that we have provided a lighting fixture that is simple in construction and relatively cheap in cost of production and installation, there being practically no installation cost involved, and which comprises means for general illumination of a store, room or other place in which the fixture is placed and also provides effective showcase lighting from a concealed source.

Having thus described our invention, what we desire to claim and to secure by United States Letters Patent is: p

1. In a device of the character described,

' reflecting surface,

reflecting surface, an inverted bowl-like member at the upper end of said stand, and means for supporting lighting means within said base and said bowl-like member, said bowl-like member comprising a light-diffusing and reflecting portion and a color-cor- 3. A lighting device comprising a vertical stand having a hollow downwardly flaring open ended base member provided with a means for supporting lighting means in said base member, an upwardly and outwardly flaring open topped light difl'using and reflecting member at the top of said stand, and means on said stand for supporting lighting means within said diffusing and reflecting member whereby the direct light from said lighting means is directed upwardly and outwardly from the upper end of said device and downwardly and outwardly from the base of said device and the zone between the direct lighted spaces is supplied with diflt'used light.

4. An illuminating system having a downwardly directed lighting element and an upwardly directed lighting element supported above said first named element, reflecting means directing the rays of light downwardly and outwardly from the downwardly directed element and. a reflecting and diffusing means causing direct light from said upwardly directed element to project upwardly and outwardly therefrom and diffusing the light which is directed downward y and outwardly from said upwardly directed element. A In witness whereof, we hereunto subscribe our names this 31st day of March, A. D., 1925.

' ROY M. GRAVES.

EUGENE R. DOLIVE.

a lightingnnit supported by said a downward direction, 

